Larvae chew "trails" on host plants leaving wiggly lines and damage to the leaves of the plants. Pupae are tiny, yellowish to dark brown and shiny. They resemble seeds (Pictures 3-6). Found hanging on the underside of the "mined" leaves. Leaf Miners are often host specific.
Suburban backyard garden, affecting planted Columbine.
Unfortunately, I don't have any images of the larvae.